mirror of
https://github.com/bilawalsidhu/gods-eye-view.git
synced 2026-11-04 18:34:02 +00:00
Sameh Khamis
c3dfa8e853
Define tools that answer questions from the app's data once, independent of the surface that exposes them. A tool declares its arguments and the services it reads; applications compose tools with their own services and optional call interceptors. Queries reuse the layers' portable source factories, so they run wherever an application routes /api requests. The first queries are get_earthquakes, get_active_fires and get_recent_launches, with a shared area argument (place name, bounding box, or point and radius) and capped lists. gods-eye-view/tools/mcp adapts a catalog to the Model Context Protocol with a small JSON-RPC handler and a stateless HTTP transport, adding no dependencies. npm run mcp serves Core's tools over stdio to local clients such as Claude Code, reading from a running app. Both exports are portable and checked by check:boundaries; the app does not import them.
68 lines
2.1 KiB
JavaScript
68 lines
2.1 KiB
JavaScript
/**
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* Local MCP server over stdio for agents such as Claude Code and Codex.
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*
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* npm run mcp -- [--api-base http://localhost:4173]
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*
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* Reads newline-delimited JSON-RPC from stdin and writes responses to stdout.
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* Tools read data from a running God's Eye View server (`npm run dev` or
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* `npm run preview`) at the API base. Diagnostics go to stderr.
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*/
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import { createInterface } from 'node:readline';
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import { fileURLToPath } from 'node:url';
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import { parseErrorResponse } from '../../src/tools/mcp/index.js';
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import { createLocalMcpServer } from './server.js';
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import { DEFAULT_API_BASE } from './services.js';
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/** Serve newline-delimited JSON-RPC until `input` ends. */
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export async function serveStdio(server, { input, output }) {
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const lines = createInterface({ input, crlfDelay: Infinity });
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const pending = new Set();
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for await (const line of lines) {
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if (!line.trim()) continue;
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const work = respond(server, line).then((response) => {
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if (response) output.write(`${JSON.stringify(response)}\n`);
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});
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pending.add(work);
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work.finally(() => pending.delete(work));
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}
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await Promise.all(pending);
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}
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async function respond(server, line) {
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let message;
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try {
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message = JSON.parse(line);
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} catch {
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return parseErrorResponse();
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}
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return server.handle(message);
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}
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/** Read `--api-base <url>` from command-line arguments. */
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export function parseArgs(argv) {
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const options = {};
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for (let index = 0; index < argv.length; index += 1) {
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if (argv[index] === '--api-base' && argv[index + 1])
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options.apiBase = argv[(index += 1)];
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else throw new Error(`Unknown argument: ${argv[index]}`);
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}
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return options;
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}
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if (process.argv[1] && fileURLToPath(import.meta.url) === process.argv[1]) {
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try {
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const options = parseArgs(process.argv.slice(2));
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console.error(
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`God's Eye View MCP server reading ${options.apiBase || DEFAULT_API_BASE}`,
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);
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await serveStdio(createLocalMcpServer(options), {
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input: process.stdin,
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output: process.stdout,
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});
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} catch (error) {
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console.error(error.message);
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process.exitCode = 1;
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}
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}
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